s390/kexec: change return value of machine_kexec_prepare

Returning -ENOSYS on kexec_load() is a bad idea since user space cannot
tell if the system call is not implmented or if it failed.
Use -EOPNOTSUPP in case somebody tries a kexec_load on a NSS image based
kernel instead.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2012-09-06 15:19:08 +02:00 committed by Martin Schwidefsky
parent a8f6db4d29
commit d978386e79

View File

@ -159,7 +159,7 @@ int machine_kexec_prepare(struct kimage *image)
/* Can't replace kernel image since it is read-only. */
if (ipl_flags & IPL_NSS_VALID)
return -ENOSYS;
return -EOPNOTSUPP;
if (image->type == KEXEC_TYPE_CRASH)
return machine_kexec_prepare_kdump();